Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China

doi:10.1007/s12583-021-1521-0

	Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China
	Xue, Ying-Yu 1,2,3,4; Liu, Haiyang 1,2,4; Wang, Zhiyi 3; Sun, Weidong1,2,4,5 ; Chen, Fukun 3
	2022-03-09
发表期刊	JOURNAL OF EARTH SCIENCE
ISSN	1674-487X
页码	19
通讯作者	Liu, Haiyang(hyliu@qdio.ac.cn)
摘要	The Qinling Orogen resulted from the collision between the North and South China blocks in the Triassic. Mesozoic granitoids, ranging from the Triassic to the Cretaceous, are widely distributed in this orogen, and they provide excellent clues for understanding the crustal evolution and geodynamic evolution of the orogenic belt. The Triassic belt is mostly located in the South Qinling, whereas the Cretaceous belt is located mostly in the North Qinling. The Taibai complex pluton is located at the conjunction of the two belts. Here we present a data set comprising zircon U-Pb dating and elemental and Sr-Nd isotopic geochemistry for Late Mesozoic granite and microgranular enclaves (MME) exposed in the Taibai complex pluton. The granite and MME yield concordant U-Pb zircon ages of 124 to 118 Ma, indicating that they were products of roughly simultaneous magmatism in the Late Mesozoic. The granite rocks are high-K, calc-alkaline, and weakly peraluminous in compositions, and they are characterized by enrichment in large ion lithophile elements (e. g., Rb, Ba), depletion in high field strength elements (e.g., Nb, Ta, Zr, Ti), and variable Sr/Y ratios of 7.64 to 63.6. Low MgO, Cr, and Ni contents imply that the magma(s) were essentially crust-derived. Both the granite and the MME show relative depletion in Sr-Nd isotopic composition (initial Sr-87/Sr-86 of 0.704 4 to 0.706 7, initial epsilon(Nd) values of -3.4 to -2.6), suggesting that the magma(s) originated from juvenile crustal rocks. These Sr-Nd isotopic characteristics are significantly different from those of other Late Mesozoic granitoids exposed elsewhere in the Qinling orogenic belt, which formed from much older and enriched sources and with negligible contributions from mantle or juvenile crust. We propose a reworking event of the juvenile crust during the Late Mesozoic that was triggered by the tectonic extension and subsequent asthenospheric upwelling that occurred in eastern China.
关键词	Qinling Orogen Mesozoic granite crustal reworking Nd isotope geochemistry
DOI	10.1007/s12583-021-1521-0
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of China[2016YFC0600404] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; National Natural Science Foundation of China[41872049] ; National Natural Science Foundation of China[41372072] ; National Natural Science Foundation of China[41903006] ; China Postdoctoral Science Foundation[2019M652497] ; China Postdoctoral Science Foundation[2020T130656]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000766434100001
出版者	CHINA UNIV GEOSCIENCES, WUHAN
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/178207
专题	深海极端环境与生命过程研究中心
通讯作者	Liu, Haiyang
作者单位	1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
通讯作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Xue, Ying-Yu,Liu, Haiyang,Wang, Zhiyi,et al. Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China[J]. JOURNAL OF EARTH SCIENCE,2022:19.
APA	Xue, Ying-Yu,Liu, Haiyang,Wang, Zhiyi,Sun, Weidong,&Chen, Fukun.(2022).Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China.JOURNAL OF EARTH SCIENCE,19.
MLA	Xue, Ying-Yu,et al."Reworking of the Juvenile Crust in the Late Mesozoic in North Qinling, Central China".JOURNAL OF EARTH SCIENCE (2022):19.

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